1. Department of Pediatrics Institute of Clinical Science at The Sahlgrenska Academy University of Gothenburg Gothenburg Sweden
2. Department of Pediatrics Queen Silvia's Children Hospital Gothenburg Sweden
3. Department of Mathematical Sciences Chalmers University of Technology and University of Gothenburg Gothenburg Sweden
4. Statistiska Konsultgruppen Gothenburg Sweden
5. Department of Pediatrics Central Hospital Skoevde Sweden
6. Department of Pediatric Radiology Queen Silvia's Children Hospital Gothenburg Sweden